Whether hitting the slopes, camping lakeside, or on a road trip, Wolf grinders make the perfect travel companion for the active cannabis user. All grinders are made from aircraft grade 6061 aluminum while the glass bowls are made of quartz (big bowl and mini), or high borosilicate glass (fusion). Around the bowl is a heat resistant silicone band that holds the bowl in place and seals the ariway between the bowl, choke, and intake for a smooth draw everytime. Check out their grinders, pipes, and rolling trays onlineor at all Shell Shock locations